Skip to content

Bread Engine 1.3.0

Choose a tag to compare

View all tags
@Nonlinear2 Nonlinear2 released this 05 Mar 17:34
· 350 commits to main since this release
v1.3.0
640b218

Bread Engine 1.3.0 is around 58 elo stronger than version 1.2.0 in STC and around 45 elo stronger in LTC.

NNUE improvements:

Until now, Bread Engine had a neural network trained on lichess pgns featuring stockfish evaluations.
Bread Engine 1.3.0 has a new neural network, that was trained from scratch using games of self-play from version 1.2.0.
The new network has a slightly modified architecture, and a bug that produced integer overflows due to bad weight clipping has been fixed.

Other improvements:

  • better transposition tables
  • code refactors

STC: 10 + 0.1 s

Results of bread_engine_1.3.0 vs bread_engine_1.2.0 (10+0.1, 1t, MB, UHO_2024_8mvs_big_+115_+134.pgn):
Elo: 57.97 +/- 13.68, nElo: 75.95 +/- 17.58
LOS: 100.00 %, DrawRatio: 39.47 %, PairsRatio: 2.09
Games: 1500, Wins: 692, Losses: 444, Draws: 364, Points: 874.0 (58.27 %)
Ptnml(0-2): [37, 110, 296, 182, 125]

LTC: 40 + 0.4 s

Results of bread_engine_1.3.0 vs bread_engine_1.2.0 (40+0.4, 1t, MB, UHO_2024_8mvs_big_+115_+134.pgn):
Elo: 45.19 +/- 19.21, nElo: 59.21 +/- 24.87
LOS: 100.00 %, DrawRatio: 39.73 %, PairsRatio: 1.72
Games: 750, Wins: 318, Losses: 221, Draws: 211, Points: 423.5 (56.47 %)
Ptnml(0-2): [20, 63, 149, 86, 57]
Assets 3
Loading